三步法提高地震分辨率处理技术在鄂尔多斯盆地苏东南地区薄砂体识别中的应用  

Three⁃step method of processing technique for enhancing the seismic resolution and its application in the thin sandbody recognition in Southeast Sugeli of Ordos Basin

作　　者：潘海娣 吕健飞 陈娟[2] 耿利强 张凯旋 PAN Haidi;LÜJianfei;CHEN Juan;GENG Liqiang;ZHANG Kaixuan(Beijing UltraDo Resources Technology Inc.Beijing 100083,China;PetroChina Changqing Oilfield Company,Xi’an 710018,China)

机构地区：[1]北京奥能恒业能源技术有限公司,北京100083 [2]中国石油天然气股份有限公司长庆油田分公司,陕西西安710018

出　　处：《大庆石油地质与开发》2021年第6期144-150,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“鄂尔多斯盆地大型岩性地层油气藏勘探开发示范工程”(2016ZX05050)。

摘　　要：随着对鄂尔多斯盆地地震勘探开发的深入,主体目标是寻找具有一定规模的岩性油气藏。寻找岩性油气藏则要求地震资料具有三高(高分辨率、高保真、高信噪比)的特征,而常规反褶积处理方法难以满足薄储层识别的应用需求。针对鄂尔多斯盆地苏东南地区薄砂体地震识别问题,提出了三步法提高地震资料分辨率处理技术:首先在叠前道集应用稳定的反Q滤波技术补偿地层的吸收衰减效应;其次利用炮检域反褶积技术压缩地震子波,改善资料波组一致性特征;最后在叠后数据体上再应用压缩感知拓频技术,进一步展宽频带,提高地震资料纵向分辨率。在实际的地震资料应用中见到了较好的识别效果,给同类地区薄砂体地震识别提供了技术支撑。With the deepening of seismic exploration and development in Ordos Basin,the main target is to find a certain scale of lithological oil and gas reservoirs.The search for lithological reservoirs requires seismic data have three high characteristics(high resolution,high fidelity and high signal⁃to⁃noise ratio),while the conventional de⁃convolution process method is difficult to meet the application needs of thin reservoir identification.Aiming at the problem of thin sand seismic identification in Southeast Sulige of Ordos Basin,a three⁃step method was proposed to enhance the resolution of seismic data.First,a stable inverse Q filtering technology was applied in pre⁃stack gathers to compensate the absorption and attenuation effect of the formation;secondly,the seismic sub⁃wave was com⁃pressed by means of shot⁃detector⁃domain deconvolution technique to improve the consistency characteristic of data wave group;finally,the compression⁃aware extending frequency technique was applied to the post⁃stack data body to further expand the frequency band and improve the vertical resolution of seismic data.In the practical application of seismic data,good recognized effects were shown,which have provided the technical support for the seismic recognition of thin sandbodies in similar areas.

关 键 词：三步法 高分辨率 反Q滤波 炮检域反褶积 薄砂体识别 

分 类 号：P631[天文地球—地质矿产勘探]